Boiler-furnace



(No Model.)

Z.B.OHURGH.

BOILER EURNGR No. 308,652. i Patented Dee. 2, '1884.

UNITED STATES PATENT OEEICE..Y

ZALMON B. CHURCH, OF MAY, MICHIGAN.

BOlLER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 308,652, dated December 2, 1884.

` Application filed September 24, 1884. (No model.)

To all whom t may concern/.-

Be it known that I, ZALMON B. CHURCH, of May, in the county of Tuscola and State of Michigan, have invented new and useful Improvements in Boiler-Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings,

l which form a part of this specication.

improvement, showing it as applied to a steam-generator or horizontal boiler of ordinary construction. Fig. 2 is a front elevation. Fig. 3 is a rear elevation. Fig. 4 is a plan of the rear cross-pipe, and Fig. 5 is a similar View of the front horizontal cross-pipe.

In the accompanying drawings, which form a part o f this specification, A represents a steam-generator, which is properly set in masonry.

B represents a rear cross-pipe provided with the downwardly-projecting legs b, the horizontal pipe B being connected to the water-space of the generator A by means of the pipes c.

C is a horizontal pipe provided with the upwardly-extending portions d. This pipe C is located at the front endof the generator, its ends being supported ,in the masonry, (shown in Fig. 2,) and to one end of such pipe C the feed-pipe is connected, while the opposite end may be used as a blow-off.

D represents a series of pipes, which are connected, as in a system of coils, to the vertical legs b d of the horizontal pipes B C, respectively, and E is another series of pipes, the forward ends of which are connected with the horizontal pipe C, while their rear ends are bent and connected with the horizontal cross-pipe B at the rear of the generator, such pipes being of different lengths, so that their bends will not come close together and` shut off the draft communication with the dues of the boiler, as will be clearly seen upon referring to Fig. l.

F is a pipe which affords'communication between the boiler and the horizontal pipe C at the front of the generator. The series of pipes E are arranged sufficiently close together so as to perform the functions of grate` bars, and it will readily be seen that the products of combustion must pass back over the bridge-wall between the pipes E at the rear end of the boiler, and between them at that point in the return of the draft to the lines of the boiler, this result being due to the interposition of the curved portion of said pipes E between the rear end of the steam-generator A and the rea-r wall of the furnace Thus the products of combustion in passing from the re-boX to the rear wall of the furnace pass between the pipes E at their lower portion, as indicated by the arrows, and as said wall deiiects the products of combustion upward and forward in their' passage to the smoke-stack they again pass between the curved portions of the pipes. By this construction and arrangement I utilize all of the heat that can be produced in an ordinary construction, while I also utilize the heat of the products of combustion by compelling them to pass between the pipes in their passage to the fines, while at the same time the side walls of my furnace are protected against injury from breaking away, which is caused in firing.

What I claim as my invention is-` 1. In combination with the boiler A and pipes D and E, the pipe C, located in front of the iire-boX, and provided with the upwardlyextending branches d d, and the pipe B, provided with the downwardly projecting branches b b, and located in the rear of the boiler, as and for the purposes specified.

2. The boilerA and pipes C and B, in co1nmunication therewith, the former located ata distance beneath the front portion of the boiler, and supported withinthe walls of the furnace, and the latter located in the rear of said boiler, in combination with the pipes E, forming the gratebars, and attached to the pipe C, and extending beneath the boiler through the fire-chamber, and curving upward, connecting with the pipe B, as and for the purposes set forth.

ZALMON B. CHURCH.

Witnesses:

J. B. CROSBY, A. B. MARKHAM.

IOO 

